Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é o valor para Oklahoma quando Nevada e Colorado são Clinton?
 ###Tabelas: CREATE TABLE mixed-doubles_finals:_15_7–8 (mixed-doubles_finals:_15_7–8_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Year INT, Championship VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents VARCHAR, Score VARCHAR) CREATE TABLE fleet (fleet_id AUTO_INCREMENT PRIMARY KEY, Manufacturer VARCHAR, Model VARCHAR, Quantity INT, Introduced INT, Retired INT) CREATE TABLE season_averages (season_averages_id AUTO_INCREMENT PRIMARY KEY, Season INT, Total Attendance INT, Games INT, Average INT, High avg. INT, Team VARCHAR, No. Of Clubs INT) CREATE TABLE politics_of_the_southwestern_states (politics_of_the_southwestern_states_id AUTO_INCREMENT PRIMARY KEY, Year VARCHAR, Arizona VARCHAR, California VARCHAR, Colorado VARCHAR, Nevada VARCHAR, New Mexico VARCHAR, Oklahoma VARCHAR, Texas VARCHAR, Utah VARCHAR) CREATE TABLE active_teams (active_teams_id AUTO_INCREMENT PRIMARY KEY, Tournament Appearances INT, Team VARCHAR, League VARCHAR, Wins INT, Final Losses INT, Semi-Final Losses INT, Fourth-Place* INT, Final Win % VARCHAR, Years of appearance VARCHAR)  
SELECT Oklahoma FROM politics_of_the_southwestern_states WHERE Nevada = clinton AND Colorado = clinton